Rita Warren, 72, was arrested at 12:20 p.m. after she threw the oil into firefighter Dean Casali's face, according to The MetroWest Daily News. Casali was among those going to Warren's 1 King St. apartment to check on her well-being.

Casali was taken to Massachusetts General Hospital with burns to his face and eyes, where he remained as of last night, a hospital spokesman said.

Prosecutor Jessica Hogan told Judge Robert Greco that firefighters and police officers went to Warren's apartment to check on her.

"She threw a pot of hot oil at the firefighters' face," Hogan said.

Police arrested Warren and charged her with assault and battery with a dangerous weapon and assault and battery on a public employee.

Hogan asked the judge to hold Warren on $1,500 bail. She said there are concerns about her mental state.

Warren's lawyer, Lindsay Kanter, argued for her release without bail. She said along with the possible mental problems, Warren is undergoing cancer treatment and has several other medical conditions.

Greco released Warren without bail, but ordered her to be taken to a hospital for a three-day mental evaluation. Warren is due back in court on Nov. 20 for a pretrial conference.

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